const int ledPins[5] = {2, 3, 4, 5, 6};  // LED pins
int count = 0;   // Counter variable
bool up = true;  // Counting direction (true = up, false = down)
int delayTime = 200;  // Default delay time
int Mode = 3;  // Change this value to switch between modes (1, 2, or 3)

void setup() {
  for (int i = 0; i < 5; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  switch (Mode) {
    case 1:  // Counting up and resetting
      for (int i = 0; i < 5; i++) {
        digitalWrite(ledPins[i], bitRead(count, i));
      }
      count++;
      if (count > 31) count = 0;
      delay(delayTime);
      break;

    case 2:  // Counting up and down
      for (int i = 0; i < 5; i++) {
        digitalWrite(ledPins[i], bitRead(count, i));
      }
      if (count == 31) {
        up = false;
      } else if (count == 0) {
        up = true;
      }
      count += up ? 1 : -1;
      delay(delayTime);
      break;

    case 3:  // Turning all LEDs on and off
      for (int i = 0; i < 5; i++) {
        digitalWrite(ledPins[i], HIGH);
      }
      delay(delayTime);
      for (int i = 0; i < 5; i++) {
        digitalWrite(ledPins[i], LOW);
      }
      delay(delayTime);
      break;
  }
}